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Simply bypass the cooling fan thermostat .G
on a 1999 jeep grand cherokee where is the coolant fan relay
check the cooling fan sensor somewhere attached of the fan housing.
The 1991 Toyota Corolla cooling fan will stay on all the time if the temperature sensor is malfunctioning. Replace the temperature sensor.
No.
bad temperature sensor
Failed fan motor.
Jeep Cherokee's have 2 cooling system fans and one climate control fan. One cooling system fan is fan belt driven and the other one is electric and is turned on/off by the engine computer at about 215*. The A/C and heater fan is electric.
it is on the thermostat housing
No
the cooling fan is designed to run after the engine is turned off. this is the case on all modern vehicles. Most people only notice this after a major repair due to sensitivity to not trusting the repair. Your radiator fan relay has failed. It is located under the front bumper cover under the passenger headlight. The fan is not supposed to run after key off on this Jeep.
Make sure that the fuse and sensor for the cooling fan are working. If these are ok then look at the fan motor, it could be bad.